Adjustable wrench



vMM 27, 1924. 1,495,751

J. v. LARsoN i ADJUSTABLE WRENCH Filed Nov. lO 1922' ywmm Patented May 27, l924.

j 1,495,751 ATENT ortica- .TOI-IN V. LARSO'N, 0F CHICAGO, ILLINOIS, ASSIGNOR 'IO ARMSTRONG BROS'. TOOL- CO.,

F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

ADJUSTABLE WRENCH.

Application filed November 10, 1922. Serial No. 600,020.

To all whom t 'may conce/m.' v

Be it known that I, JOHN V. LAnsoN,-a citizen of the United States of America, and a resident of Chicago7 county of Cook,

State of Illinois, have invented certain new and useful Improvements in Adjustable Treno-hes, of which the following is a specific-ation.

This invention relates to that class of ad- 10 justable wrenches in which the movable jaw member and its adjusting sleeve nut are pivotally connected to main or stationary jaw member to admit of a limited opening movement of the wrench jaws by manual actuation in an initial application of the implement to the work to be operated on. And the present improvement has for its objects:- j

To provide a structural formation and combination of parts whereby a pivotal connection of the wrenchA members is attained in a simple, strong and efficient manner.

To provide a construction wherebyl the adjusting` sleeve nut of the implement, is

held in place against loss, when the movable j aw member is detached for replacement and the like.

To provide a construction in which the spring by which the normal pivotal position of the movable jaw member is maintained, is held to form a slide for the movable jaw member and in a manner to prevent a binding action of the threaded shank of Said jaw member against the guides thereof, all

as will hereinafter more fully appear.

In the accompanying drawing Fig. l, is a side elevation of an adjustable wrench embodying the present invention, parts being broken away and in section. l

Fig. 2, is a transverse sectional elevation on line 2-2, Fig. 1. i

Fig. 3, is a transverse section on line 3 3, Fig. l. u

Fig. 4, is a detail horizontal sectionqo "u line 4 4, Fig. 3. Y

Fig. 5, is a detached perspective view of the stationary wrench member and attached spring.

Fig. 6, is a detail perspective view of the guiding and confining yoke of the wrench.

Like reference numerals parts in the several views.

Referring to the drawing, l designates the handle or body portion of the stationary indicate like jaw member of the wrench, formed at its forward end with the usual rectangular groove for the reception of the usual .attaching tongue of the stationary wrench jaw 2. In the present improvement the body portion l is provided with a pair of upstanding cheek plates 3 of a hookshape and arranged in transverse spaced relation to provide a receiving and-guiding channel for the shank portion of the movable jaw member of the wrench. The hook parts 4.of said cheek plates 3 extend rearwardly and are adapted for engagement in thehereinafter described circular cavity yof the adjusting sleeve nut of the movable wrench member. In addition the body portion 1 aforesaid is formed with vertical channels 5 in its sides and a distance to the rear of its forward end for the iXed attachment of the hereinafter described .guiding andconfining yoke member.

6 designates the guiding and confining yoke above referred to, formed of plate metal and having an inverted, U shape, with its parallel side plates adapted to fit the side channels 5 aforesaid, and be iixedly secured therein by rivetsy or like fastening means. The upstanding portion of the yoke 6 provides a guide channel for the screw threaded shank of the movable jaw member of the wrench, and in the present improvement the side plates of the yoke are formed with abutment shoulders 7 for stop engagement with the free end of the spring hereinafter described. c

8 designates the adjustable jaw member of the wrench having the usual rearwardly eX- tending screw threaded shank 9, the sides of which are flattened and are adapted to have sliding movement between the aforesaid upf 95 standing cheek plates 3 and in the yoke 6, in an adjustment of parts.

l() designates an adjusting sleeve nut, arranged between upstanding cheek plates 3 and the yoke 6, with its screw threaded bore 100 having operative engagement with the' screw threaded shank 9 of the jaw member 8 aforesaid. In the present improvement the sleeve nut 1() is formed with a rounded forward end, preferably of a peripherally enlarged 105 form as shown, inside of which is formed a circular counterbore or cavity adapted to receive the rearwardly extending hook p0rtions 4 of the upstanding cheek plates 3 of the main body l, and with the parts having 11 l member and its associated parts in practical use.

VVitfh the described construction the axis of pivotal movement of the movable jaw member 8 and associated parts is brought into comparatively close rearward relation to the stationary jaw member 2 and on a plane with the upper portion of said stationary member. This location has proven to be the proper point of pivotal connection for effective practical operation and avoidance of slip, as evidenced by the very eX- tended public adoption and approval of the Cochran wrench, the pioneer patent on which was issued January 25th, 1898, No. 597,762.

With the present construction the yoke 6 is adapted to maintain the circular cavity in the forward end of the sleeve nut 10 in encircling engagement with the hook portions 4 of the upstanding cheek plates 3, and maintain said nut in position in a partial dismemberment of the wrench, in that a preliminary detachment of the yoke 6 is required, to attain a removal of said nut.

13 designates a spring preferably of the plate type shown, secured at one end to the main body portion 1 of the wrench, with its free end provided with side lugs 14 adapted for abutmentbeneath the shoulders 7 of the yoke 6 aforesaid. As so arranged the upper spring only acting as a yielding resistance to the pivotal or rocking movement of the movable jaw member, by hand, in an initial application of the wrench.

Having thus fully described my invention,

K which I claim as new and desire to secure by Letters Patent, is

' 1. In a wrench of the type described, a

/ stationary member provided with a wrench jaw and formed with a transverse saddle bearing, a movable member having a wrench jaw and a screw threaded shank, and an op- 'erating sleeve nut engaging said shank and formed with a rounded forward end for combined turning and rocking movements in the saddle bearing of the stationary member with the rocking movement at the lower for- Ward end of the nut.

2. In a wrench ofthe type described, a stationary member provided with a wrench jaw and formed with a transverse saddle bearing, a movable member having a wrench jaw and a screw threaded shank, an operating sleeve nut engaging said shank and formed with a rounded forward end for combined turning and rocking movements in the saddle bearing of the stationary member with the rocking movement at the lower forward end of the nut, and a yoke member fixed on the stationary member and forming a guide for the shank of the movable jaw member and an abutment for the rear end of the sleeve nut.

3. In a wrench of the type described, a stationary member provided with a wrench jaw and having a pair of transversely spaced cheek plates adjacent to said jaw and formed with rearwardly extending lugs and with saddle bearings adjacent to the upper surface of'said stationary member, a movable member having a wrench jaw and a screw threaded shank, and an operating sleeve nut engaging said shank and formed with a rounded forward end of a peripherally enlarged form for combined turning and rocking movement at the lower forward end of the nut, the forward end of the sleeve nut having a counterbore for the reception of the lugs of the cheek plates.

4. In a wrench of the type described, a stationary member provided with a wrench jaw and having a pair of transversely spaced cheek plates adjacent to said jaw and formed with rearwardly extending lugs and with saddle bearings adjacent to the upper surface of said stationary member, a movable member having a wrench jaw and a screw threaded shank, and an operating sleeve nut engaging said shank and formed with a rounded forward end of a peripherally enlarged. form for combined turning and rocking movements in the saddle bearings of said cheek plates with the rocking movement at the lower forward end of the nut, the forward end of the sleeve nut having a counterbore for the reception of the lugs of the cheek plates, anda yoke member fixed on the Stationary member to form a guide for the shank of the movable jaw member and an abutment for the rear end of the sleeve nut.

Signed at Chicago, Illinois, this 4th day of November, 1922.

JOHN V. LARSON. 

